#include<stdio.h>
int main(int argc, char const *argv[])
{
    int nl,nm,i,j,flag,count=0;
    do
    {
        printf("Input START and END=?");
        scanf("%d%d",&nl,&nm);
    }while(!(nl>0&&nl<nm));
    printf("--------------PRIME TABLE(%d--%d)---------------\n",nl,nm);
    if(nl==1||nl==2)
    {
        printf("%4d",2);
        nl=3;
        count++;
    }
    for(i=nl;i<=nm;i++)
    {
        if(!(i%2))
            continue;
        for(flag=1,j=3;flag&&j<i/2;j+=2)
            if(!(i%j))flag=0;
        if(flag)
            printf(++count%15?"%4d":"%4d\n",i);
    }
    return 0;
}
